Mechwarrior 4 + Cedega + DirectPlay HOWTO

[wacati]

I was recently trying to get Mechwarrior 4 to work on linux. I did quite a bit of searching but never really found much info about Mechwarrior 4 working in linux. This post is to show how I got the game to work and to possibly help others in getting it to work.

Quite a few files are needed to get Mechwarrior 4 installed and running.

For one, the msadp32.acm (ADPCM) file is required by the installer. This can be found in the media-libs/win32codecs package ('emerge win32codecs' or get them at http://www.mplayerhq.hu/) which is installed to /usr/lib/win32/msadp32.acm on Gentoo by default.
Copy the msadp32.acm file to your wine drive's C:\windows\system32 directory.
After this, you should be able to install Mechwarrior 4 fine.

To run Mechwarrior 4 in multiplayer, you will need to get directplay to work.
A few files you will need for directplay in cedega are:
DPLAY.DLL, DPLAYSVR.EXE, DPLAYX.DLL, DPWSOCK.DLL, and DPWSOCKX.DLL
(I'm not exactly sure if all these are needed but I know DPWSOCKX.DLL is required and DPLAYSVR.EXE is required to host a server in a directplay game, although, I can't figure out how to get MW4 to host a game, since it always crashes)
I don't really know which exact versions you need... I don't really know which versions I have. I tried many different versions but not all worked. However, I do know that these are the files required to play Mechwarrior 4 (and any other directplay game I suppose) in multiplayer.
Copy those files to your wine drive's C:\windows\system32 directory.

After copying the files, you will need to edit the registry of cedega (~/.transgaming/system.reg) and add these lines (don't forget to backup your system.reg first, just in case...):